CN204020865U - A kind of engineering truck responds hydraulic brake system fast - Google Patents
A kind of engineering truck responds hydraulic brake system fast Download PDFInfo
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- CN204020865U CN204020865U CN201420325318.2U CN201420325318U CN204020865U CN 204020865 U CN204020865 U CN 204020865U CN 201420325318 U CN201420325318 U CN 201420325318U CN 204020865 U CN204020865 U CN 204020865U
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Abstract
A kind of engineering truck responds hydraulic brake system fast, comprise the snap catch unit that several are made up of the drg be arranged on axletree and the pilot operated valve device that is connected with drg, also comprise the Hydraulic Pump connected with hydraulic reservoir by oil suction pipe, Hydraulic Pump is connected with each pilot operated valve device by energy-storage system, tell energy-storage system and comprise energy storage and be the prefill valve of energy storage topping up, the connecting line that energy storage connects with prefill valve is provided with check valve; Described pilot operated valve device is provided with pilot control hydraulic fluid port, and pilot control hydraulic fluid port is connected with hydraulic reservoir by brake activation valve, and brake activation valve is provided with the pressure relief opening connected with hydraulic reservoir by oil return line.The utility model solves the brake request that large engineering vehicle responds fast well, and for the drg of different size, the different supercharging pressures by prefill valve setting meet the requirement of car brakeing.
Description
Technical field
The utility model relates to a kind of engineering truck brake system, and particularly a kind of engineering truck responds hydraulic brake system fast.
Background technology
Hydraulic brake system is usually used in the brake system of mining engineering truck, this just require hydraulic brake system to have reliability is high, the feature of fast response time, with the braking time of most shortening vehicle, reduce braking distance.But because large-scale mine engineering truck drg quantity is more, cause conventional hydraulic brake system to there is the problem of response lag when braking.Conventional hydraulic brake system pressure oil-source by brake activation valve direct effect on the brake.When drg quantity reaches 16, because brake system hydraulic pipeline is longer, the impact of the factors such as through-current capability restriction, the needs that whole drg realizes snap catch can not be met in time, adopt conventional hydraulic brake system will there is car brakeing response lag phenomenon, the requirement of large-scale mine engineering truck deceleration and stopping performance can not be met.
Summary of the invention
The technical problems to be solved in the utility model is for the deficiencies in the prior art, a kind of raising large-scale mine engineering truck braking response speed is proposed, the braking effect of car load can be improved, guarantee that the brake system of vehicle meets the engineering truck that braking performance of vehicle requires and responds hydraulic brake system fast.
The technical problems to be solved in the utility model is achieved through the following technical solutions, a kind of engineering truck responds hydraulic brake system fast, comprise the snap catch unit that several are made up of the drg be arranged on axletree and the pilot operated valve device that is connected with drg, be characterized in: also comprise the Hydraulic Pump connected with hydraulic reservoir by oil suction pipe, Hydraulic Pump is connected with each pilot operated valve device by energy-storage system, tell energy-storage system and comprise energy storage and be the prefill valve of energy storage topping up, the connecting line that energy storage connects with prefill valve is provided with check valve; Described pilot operated valve device is provided with pilot control hydraulic fluid port, and pilot control hydraulic fluid port is connected with hydraulic reservoir by brake activation valve, and brake activation valve is provided with the pressure relief opening connected with hydraulic reservoir by oil return line.
The technical problems to be solved in the utility model can also be come to realize further by the following technical programs, is provided with skimmer circuit, skimmer circuit is provided with by pass valve between the oil outlet and oil return line of Hydraulic Pump.
The technical problems to be solved in the utility model can also be come to realize further by the following technical programs, and the connecting line between check valve and energy storage is provided with shutoff valve.
The technical problems to be solved in the utility model can also be come to realize further by the following technical programs, and described prefill valve is one-way back pressure valve.
Compared with prior art, the utility model utilizes energy storage and the prefill valve for energy storage topping up, during the setup pressure value of the oil liquid pressure in energy storage lower than prefill valve, prefill valve just gives energy storage topping up in time, until reach the force value of setting, like this, the braking needs that system responds fast can be met; Utilize the shutoff valve be arranged between check valve and energy storage, when energy storage et out of order damages, facilitate the replacing of energy storage to safeguard; Utilize the by pass valve be arranged on skimmer circuit, ensure that system has enough brake-pressures to be supplied to drg on the one hand, the maximal pressure force value of restriction system, prevents hypertonia from causing damage to system, system is played to the effect of safety guard-safeguard on the other hand.The utility model solves the brake request that large engineering vehicle responds fast well, and for the drg of different size, the different supercharging pressures by prefill valve setting meet the requirement of car brakeing.
Accompanying drawing explanation
Fig. 1 is hydraulic schematic diagram of the present utility model.
Detailed description of the invention
A kind of engineering truck responds hydraulic brake system fast, comprise the snap catch unit that several are made up of the drg 10 be arranged on axletree and the pilot operated valve device 9 that is connected with drg 10, also comprise the Hydraulic Pump 2 connected with hydraulic reservoir 1 by oil suction pipe, Hydraulic Pump 2 is connected with each pilot operated valve device 9 by energy-storage system, tell energy-storage system and comprise energy storage 8 and be the prefill valve 5 of energy storage 8 topping up, the connecting line that energy storage 8 connects with prefill valve 5 is provided with check valve 6; Described pilot operated valve device 9 is provided with pilot control hydraulic fluid port, and pilot control hydraulic fluid port is connected with hydraulic reservoir 1 by brake activation valve 4, and brake activation valve 4 is provided with the pressure relief opening connected with hydraulic reservoir 1 by oil return line.Described Hydraulic Pump 2 is propulsions source, for drg provides brake-pressure oil sources.Described brake activation valve 4 is as control element, and for pilot operated valve device provides pilot control pressure, the Pk mouth of brake activation valve is pilot control oil sources, and the pilot control hydraulic fluid port of pilot operated valve device is connected with system oil return by brake activation valve, now releasing of brake, normal vehicle operation.Described prefill valve 5 is mainly energy storage topping up, make the pressure oil liquid being full of setting in energy storage all the time, to meet the needs that brake system responds fast, as long as the oil liquid pressure in energy storage is lower than the setup pressure value of prefill valve, prefill valve just gives energy storage topping up in time, until reach setup pressure value.Described check valve 6 is arranged on the hydraulic brake circuit at energy storage place, after energy storage is full of setting pressure fluid, and prefill valve commutation work.Described energy storage 8 is as deposit brake-pressure oil sources, and the moment is standby, arranges an energy storage near each drg, forms independent snap catch unit, ensures the needs that brake system responds fast.Described pilot operated valve device is a pilot control element, and when guide's control port C is without pressure oil effect, pilot operated valve device is in upper work, energy storage and drg is disconnected, vehicle brake off; When guide's control port C has pressure oil, pilot operated valve device is in the next work, is communicated with by energy storage, realizes snap catch with drg.Described drg is arranged on axletree, is the hydraulic braking executive device of vehicle, realizes car brakeing during cut-in pressure oil, vehicle brake off during opening pressure oil.
Between the oil outlet and oil return line of Hydraulic Pump 2, be provided with skimmer circuit, skimmer circuit be provided with by pass valve 3; Connecting line between check valve 6 and energy storage 8 is provided with shutoff valve 7; Described prefill valve 5 is one-way back pressure valve.Described by pass valve 3 pairs of native systems play the effect of safety guard-safeguard, and by setting oil pressure relief value, ensure that system has enough brake-pressures to be supplied to drg on the one hand, the maximal pressure force value of restriction system, prevents hypertonia from causing damage to system on the other hand.Described shutoff valve 7 is in conducting state when system worked well, when energy storage et out of order damages, shutoff valve can be closed, prevent brake system non-functional, and the replacing being simultaneously also convenient to energy storage is safeguarded.
Hydraulic principle of the present utility model: Hydraulic Pump provides pressure oil-source for hydraulic braking quick response system, is energy storage topping up by prefill valve, until reach the force value of setting, when prefill valve is in upper work, system is energy storage topping up; When the supercharging pressure of energy storage reaches the setup pressure value of prefill valve, prefill valve is in the next work under therein retroactive effect, and now, the pressure oil-source that Hydraulic Pump provides to hydraulic reservoir, reduces the loss in efficiency of system through the direct off-load of prefill valve.When vehicle needs braking, chaufeur pin steps on brake activation valve, and brake activation valve is commutated and is in the next work, pilot control oil sources Pk now acts on the pilot control hydraulic fluid port C of pilot operated valve device by brake activation valve, force pilot operated valve device to commutate and be in the next work, realize vehicle snap catch.Can meet the demands because pilot control oil supply pressure that the pilot control chamber volume of pilot operated valve device is little, required is greater than 16bar, this guarantees the moment of stepping on brake activation valve braking at chaufeur, pilot operated valve device can commutate in time and be in the next work, make standby energy storage and drg conducting, reach the object of vehicle snap catch.
Claims (4)
1. an engineering truck responds hydraulic brake system fast, comprise the snap catch unit that several are made up of the drg be arranged on axletree and the pilot operated valve device that is connected with drg, it is characterized in that: also comprise the Hydraulic Pump connected with hydraulic reservoir by oil suction pipe, Hydraulic Pump is connected with each pilot operated valve device by energy-storage system, tell energy-storage system and comprise energy storage and be the prefill valve of energy storage topping up, the connecting line that energy storage connects with prefill valve is provided with check valve; Described pilot operated valve device is provided with pilot control hydraulic fluid port, and pilot control hydraulic fluid port is connected with hydraulic reservoir by brake activation valve, and brake activation valve is provided with the pressure relief opening connected with hydraulic reservoir by oil return line.
2. engineering truck according to claim 1 responds hydraulic brake system fast, it is characterized in that: between the oil outlet and oil return line of Hydraulic Pump, be provided with skimmer circuit, skimmer circuit is provided with by pass valve.
3. engineering truck according to claim 1 responds hydraulic brake system fast, it is characterized in that: the connecting line between check valve and energy storage is provided with shutoff valve.
4. engineering truck according to claim 1 responds hydraulic brake system fast, it is characterized in that: described prefill valve is one-way back pressure valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420325318.2U CN204020865U (en) | 2014-06-18 | 2014-06-18 | A kind of engineering truck responds hydraulic brake system fast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420325318.2U CN204020865U (en) | 2014-06-18 | 2014-06-18 | A kind of engineering truck responds hydraulic brake system fast |
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| Publication Number | Publication Date |
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| CN204020865U true CN204020865U (en) | 2014-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420325318.2U Active CN204020865U (en) | 2014-06-18 | 2014-06-18 | A kind of engineering truck responds hydraulic brake system fast |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109789867A (en) * | 2016-09-30 | 2019-05-21 | 西门子移动有限公司 | The method of the fluid-pressure system of the fluid-pressure system and operation vehicle of vehicle |
-
2014
- 2014-06-18 CN CN201420325318.2U patent/CN204020865U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109789867A (en) * | 2016-09-30 | 2019-05-21 | 西门子移动有限公司 | The method of the fluid-pressure system of the fluid-pressure system and operation vehicle of vehicle |
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